1161351065 has 16 divisors (see below), whose sum is σ = 1600723200. Its totient is φ = 792348480.

The previous prime is 1161351053. The next prime is 1161351067. The reversal of 1161351065 is 5601531611.

It is not a de Polignac number, because 1161351065 - 2⁸ = 1161350809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161351067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76406 + ... + 90335.

It is an arithmetic number, because the mean of its divisors is an integer number (100045200).

Almost surely, 2^1161351065 is an apocalyptic number.

It is an amenable number.

1161351065 is a deficient number, since it is larger than the sum of its proper divisors (439372135).

1161351065 is a wasteful number, since it uses less digits than its factorization.

1161351065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166952.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 1161351065 is about 34078.6012770477. The cubic root of 1161351065 is about 1051.1253437398.

Adding to 1161351065 its reverse (5601531611), we get a palindrome (6762882676).

The spelling of 1161351065 in words is "one billion, one hundred sixty-one million, three hundred fifty-one thousand, sixty-five".